diff --git a/dev-requirements.txt b/dev-requirements.txt
index 1cd34cc..f5db3df 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -83,7 +83,7 @@ six==1.16.0
     #   virtualenv
 snowballstemmer==2.1.0
     # via sphinx
-sphinx==4.3.1
+sphinx==5.1.0
     # via
     #   -r dev-requirements.in
     #   recommonmark